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Nano Research 2016, 9(11): 3528-3535 https://doi.org/10.1007/s12274-016-1229-0
Research Article | Issue | Published: 30 August 2016

Contrasting room-temperature hydrogen sensing capabilities of Pt-SnO2 and Pt-TiO2 composite nanoceramics

Show Author's Information Yao Xiong1,  Wanping Chen1( ),  Yesheng Li2,  Ping Cui3,  Shishang Guo1,  Wei Chen3,  Zilong Tang2,  Zijie Yan4,  Zhenyu Zhang3( )
School of Physics and TechnologyWuhan UniversityWuhan430072China
School of Materials Science and EngineeringState Key Laboratory of New Ceramics and Fine ProcessingTsinghua UniversityBeijing100084China
International Center for Quantum Design of Functional Materials (ICQD)Hefei Laboratory for Physical Sciences at Microscale (HFNL)and Synergetic Innovation Center of National Quantum Information and Quantum PhysicsUniversity of Science and Technology of ChinaHefei230026China
Department of Chemical and Biomolecular EngineeringClarkson UniversityPotsdamNew York13699USA
Keywords:
sensors, hydrogen, SnO2, nanoceramics, room-temperature
Cite this article:
Xiong Y, Chen W, Li Y, et al. Contrasting room-temperature hydrogen sensing capabilities of Pt-SnO2 and Pt-TiO2 composite nanoceramics. Nano Research, 2016, 9(11): 3528-3535. https://doi.org/10.1007/s12274-016-1229-0
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Abstract Full text About this article

Contrasting room-temperature hydrogen sensing behaviors have been revealed for Pt-TiO2 and Pt-SnO2 composite nanoceramics. In the case of the Pt-TiO2 nanoceramics, the ultrahigh hydrogen sensitivities are lost abruptly when the oxygen/hydrogen concentration ratio in ambient atmosphere reaches a critical value. However, in the case of the Pt-SnO2 nanoceramics, such a phenomenon does not occur, and the extraordinary room-temperature hydrogen sensing capabilities are observed in the presence of oxygen in air. Our combined experimental and theoretical investigations establish a unified mechanism for both the systems, which is rooted in hydrogen chemisorption on the surface and interstitial lattice sites of SnO2 and TiO2; the difference in stability of the chemisorbed hydrogen on SnO2 and TiO2 is considered responsible for the contrasting hydrogen sensing capabilities. The central findings are helpful in enriching our microscopic understanding of hydrogen interaction with various metal oxide semiconductors (MOSs) at room temperature in varying mixed gaseous concentrations, and they could be instrumental in developing reliable room-temperature hydrogen sensors based on bulk MOSs.


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About this article

Contrasting room-temperature hydrogen sensing capabilities of Pt-SnO2 and Pt-TiO2 composite nanoceramics

Show Author's information Yao Xiong1, Wanping Chen1( ), Yesheng Li2, Ping Cui3, Shishang Guo1, Wei Chen3, Zilong Tang2, Zijie Yan4, Zhenyu Zhang3( )
School of Physics and TechnologyWuhan UniversityWuhan430072China
School of Materials Science and EngineeringState Key Laboratory of New Ceramics and Fine ProcessingTsinghua UniversityBeijing100084China
International Center for Quantum Design of Functional Materials (ICQD)Hefei Laboratory for Physical Sciences at Microscale (HFNL)and Synergetic Innovation Center of National Quantum Information and Quantum PhysicsUniversity of Science and Technology of ChinaHefei230026China
Department of Chemical and Biomolecular EngineeringClarkson UniversityPotsdamNew York13699USA

Abstract

Contrasting room-temperature hydrogen sensing behaviors have been revealed for Pt-TiO2 and Pt-SnO2 composite nanoceramics. In the case of the Pt-TiO2 nanoceramics, the ultrahigh hydrogen sensitivities are lost abruptly when the oxygen/hydrogen concentration ratio in ambient atmosphere reaches a critical value. However, in the case of the Pt-SnO2 nanoceramics, such a phenomenon does not occur, and the extraordinary room-temperature hydrogen sensing capabilities are observed in the presence of oxygen in air. Our combined experimental and theoretical investigations establish a unified mechanism for both the systems, which is rooted in hydrogen chemisorption on the surface and interstitial lattice sites of SnO2 and TiO2; the difference in stability of the chemisorbed hydrogen on SnO2 and TiO2 is considered responsible for the contrasting hydrogen sensing capabilities. The central findings are helpful in enriching our microscopic understanding of hydrogen interaction with various metal oxide semiconductors (MOSs) at room temperature in varying mixed gaseous concentrations, and they could be instrumental in developing reliable room-temperature hydrogen sensors based on bulk MOSs.

Keywords: sensors, hydrogen, SnO2, nanoceramics, room-temperature

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Publication history
Copyright
Acknowledgements

Publication history

Received: 06 June 2016
Revised: 18 July 2016
Accepted: 23 July 2016
Published: 30 August 2016
Issue date: November 2016

Copyright

© Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2016

Acknowledgements

Acknowledgements

This work was supported by the National Natural Science Foundation of China (Nos. 61434002, J1210061, 11204286, and 11504357), the National High-tech R & D Program of China (No. 2013AA031903), and the National Basic Research Program of China (No. 2014CB921103).

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